Broad variety of factors (environmental, physical, etc) that contribute to a road’s overall safety;
Important for general users, in addition to administrative/government officials, to be able to assess road conditions easily in a user-friendly interface;
Average driver may consult the map and analysis before travel;
DOT planners, police officers and other professionals may look deeper into contributing factors;
They are all non-programmers and thus need an interactive environment that visualize past accidents and tell them what factors contribute most to crashes;
Rainy day, steep downhill curved road, old car, young driver;